Method and system for polar code coding

Abstract

A system and method for polar code coding with information bits placed in particular bit indexes are disclosed herein. In one embodiment, a method for channel coding includes: associating, by a polar code encoder, a first bit sequence with first bit indexes of a polar code input; associating, by the polar code encoder, a second bit sequence with second bit indexes, wherein the first bit indexes have a higher reliability than the second bit indexes; and encoding, by the polar code encoder, both the first bit sequence and the second bit sequence using a generator matrix to generate encoded bits.

What is claimed is: 
     
       1. A method for channel coding, comprising:
 obtaining information bits to be encoded, wherein the information bits comprise a first bit sequence and a second bit sequence, wherein the first bit sequence requires a lower bit error ratio than the second bit sequence; 
 associating, by a polar code encoder, the first bit sequence of the information bits with first bit indexes of a polar code input; 
 associating, by the polar code encoder, the second bit sequence of the information bits with second bit indexes of the polar code input, wherein the first bit indexes have a higher reliability than the second bit indexes; and 
 encoding, by the polar code encoder, both the first bit sequence and the second bit sequence using a generator matrix to generate encoded bits. 
 
     
     
       2. The method of  claim 1 , wherein the first bit indexes have a lower bit error ratio than the second bit indexes. 
     
     
       3. The method of  claim 1 , wherein the first bit sequence is associated with control information. 
     
     
       4. The method of  claim 1 , wherein the first bit sequence is associated with at least one of: a rank indicator, a channel state information reference signal resource index, a precoding type indicator, an acknowledgement, and a negative-acknowledgement. 
     
     
       5. The method of  claim 1 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes comprise initial indexes of the bit index set. 
 
     
     
       6. The method of  claim 1 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes comprise final indexes of the bit index set. 
 
     
     
       7. The method of  claim 1 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes are determined by analyzing the bit index set using at least one of the following techniques: density evolution, Gaussian approximation, polarization weight, row weight, column weight and predefined reliability values. 
 
     
     
       8. The method of  claim 1 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes are defined irrespective of a size of the bit index set. 
 
     
     
       9. A method for channel coding, comprising:
 receiving, by a polar code decoder, encoded information bits comprising a first bit sequence and a second bit sequence, wherein:
 the first bit sequence requires a lower bit error ratio than the second bit sequence, 
 the first bit sequence is associated with first bit indexes of a polar code, 
 the second bit sequence is associated with second bit indexes of the polar code, 
 the first bit indexes have a higher reliability than the second bit indexes, and 
 the first bit sequence and the second bit sequence are encoded based on the polar code using a generator matrix; and 
 
 decoding, by the polar code decoder, the encoded information bits based on the polar code. 
 
     
     
       10. The method of  claim 9 , wherein the first bit indexes have a lower bit error ratio than the second bit indexes. 
     
     
       11. The method of  claim 9 , wherein the first bit sequence is associated with control information. 
     
     
       12. The method of  claim 9 , wherein the first bit sequence is associated with at least one of: a rank indicator, a channel state information reference signal resource index, a precoding type indicator, an acknowledgement, and a negative-acknowledgement. 
     
     
       13. The method of  claim 9 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes comprise initial indexes of the bit index set. 
 
     
     
       14. The method of  claim 9 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes comprise final indexes of the bit index set. 
 
     
     
       15. The method of  claim 9 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes are determined by analyzing the bit index set using at least one of the following techniques: density evolution, Gaussian approximation, polarization weight, row weight, column weight and predefined reliability values. 
 
     
     
       16. The method of  claim 9 , wherein:
 a bit index set comprises the first bit indexes and the second bit indexes, and 
 the first bit indexes are defined irrespective of a size of the bit index set.